The grace of God is the greatest theme of the entire NT and it all comes through Jesus Christ as the God of all grace to sinful man. You say that you will stand on the true grace of God as taught in scripture and none of this cheap grace stuff. Why don't you take the time (as you have done with the rapture and salvation) and explain what the scriptures teach about the grace of God. I am sure that there are many that would like to hear what you have to say about grace. No pressure and take your time.
Here is a quick respnse nothing extensive, I will give an extensive response later.
We are not covered by grace, so that are sins are of no consequence.
We are empowered by grace to sin no more.
2nd cor 6:1 We then as workers together in with him, beseech you also that you receive not the grace in God in vain.
God has given us the power to overcome sin if we use his grace as a covering for our sin instead of the power to overcome it, then we have received the grace of God in vain.
1st John 2:1 My little children these things I write unto you THAT YOU SIN NOT. And if any man sin we have an advocate with the Father, Jesus Christ the righteous.
We are not to sin, grace was not given so we could sin BUT IF we sin Jesus will forgive us but we must confess are sin to Jesus if not then they will not be forgiven.
If we believe that we can just continue in sin because we are under grace we are mistaken.
1st John 1:9 IF WE CONFESS our sin,he is faithful and just to forgive us our sin and to cleanse us from all unrighteousness.
We can misuse the grace God has given us,we can receive it in vain and end up destroyed with the rest of the unrighteous.
Hebrews 10:29 Of how much sorer punishment, suppose you,shall be thought worthy, who has trodden under foot the Son of God, and has counted the blood of the covenant,wherewith he was sanctified an unholy thing,and has done despite unto the Spirit of Grace.
This are those that continue in unrepentant sin because they believe themselves to be covered by grace.
Instead of using the grace of God to cleanse themselves of all unrighteousness as scripture says we should.
The grace of God is that we can be forgiven of our sin through faith in Christ by repenting and remission of sin.
The grace of God never taught that we could continue in unrepentant sin.